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add V8P backlight hack from Jan-Michael Brummer (FDO #85977)

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This commit is contained in:
Adam Williamson 2014-11-24 16:14:33 -08:00
parent f15c219bae
commit 187aae4b6b
2 changed files with 278 additions and 0 deletions
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270
baytrail-backlight.patch Normal file
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@ -0,0 +1,270 @@
diff -ur old/drivers/gpu/drm/i915/i915_drv.h linux-3.18.0-0.rc6.git0.1.1awb.x86_64/drivers/gpu/drm/i915/i915_drv.h
--- old/drivers/gpu/drm/i915/i915_drv.h 2014-11-24 16:07:51.597050369 -0800
+++ linux-3.18.0-0.rc6.git0.1.1awb.x86_64/drivers/gpu/drm/i915/i915_drv.h 2014-11-24 16:08:28.199423974 -0800
@@ -2223,6 +2223,7 @@
bool disable_vtd_wa;
int use_mmio_flip;
bool mmio_debug;
+ bool force_backlight_pmic;
};
extern struct i915_params i915 __read_mostly;
diff -ur old/drivers/gpu/drm/i915/i915_params.c linux-3.18.0-0.rc6.git0.1.1awb.x86_64/drivers/gpu/drm/i915/i915_params.c
--- old/drivers/gpu/drm/i915/i915_params.c 2014-11-24 16:07:51.590050297 -0800
+++ linux-3.18.0-0.rc6.git0.1.1awb.x86_64/drivers/gpu/drm/i915/i915_params.c 2014-11-24 16:08:28.200423985 -0800
@@ -51,6 +51,7 @@
.disable_vtd_wa = 0,
.use_mmio_flip = 0,
.mmio_debug = 0,
+ .force_backlight_pmic = 0,
};
module_param_named(modeset, i915.modeset, int, 0400);
@@ -173,3 +174,7 @@
MODULE_PARM_DESC(mmio_debug,
"Enable the MMIO debug code (default: false). This may negatively "
"affect performance.");
+
+module_param_named(force_backlight_pmic, i915.force_backlight_pmic, bool, 0600);
+MODULE_PARM_DESC(force_backlight_pmic,
+ "Force backlight adjusting through pmic (default: false).");
diff -ur old/drivers/gpu/drm/i915/intel_dsi.c linux-3.18.0-0.rc6.git0.1.1awb.x86_64/drivers/gpu/drm/i915/intel_dsi.c
--- old/drivers/gpu/drm/i915/intel_dsi.c 2014-11-24 16:07:51.590050297 -0800
+++ linux-3.18.0-0.rc6.git0.1.1awb.x86_64/drivers/gpu/drm/i915/intel_dsi.c 2014-11-24 16:08:14.207281155 -0800
@@ -140,6 +140,8 @@
struct drm_i915_private *dev_priv = dev->dev_private;
struct intel_crtc *intel_crtc = to_intel_crtc(encoder->base.crtc);
struct intel_dsi *intel_dsi = enc_to_intel_dsi(&encoder->base);
+ struct intel_connector *intel_connector =
+ &intel_dsi->attached_connector->base;
int pipe = intel_crtc->pipe;
u32 temp;
@@ -163,6 +165,8 @@
I915_WRITE(MIPI_PORT_CTRL(pipe), temp | DPI_ENABLE);
POSTING_READ(MIPI_PORT_CTRL(pipe));
}
+
+ intel_panel_enable_backlight(intel_connector);
}
static void intel_dsi_pre_enable(struct intel_encoder *encoder)
@@ -237,6 +241,8 @@
struct drm_i915_private *dev_priv = dev->dev_private;
struct intel_crtc *intel_crtc = to_intel_crtc(encoder->base.crtc);
struct intel_dsi *intel_dsi = enc_to_intel_dsi(&encoder->base);
+ struct intel_connector *intel_connector =
+ &intel_dsi->attached_connector->base;
int pipe = intel_crtc->pipe;
u32 temp;
@@ -253,6 +259,8 @@
msleep(2);
}
+ intel_panel_disable_backlight(intel_connector);
+
/* Panel commands can be sent when clock is in LP11 */
I915_WRITE(MIPI_DEVICE_READY(pipe), 0x0);
@@ -670,6 +678,7 @@
DRM_DEBUG_KMS("\n");
intel_panel_fini(&intel_connector->panel);
+ intel_panel_destroy_backlight(connector);
drm_connector_cleanup(connector);
kfree(connector);
}
@@ -786,6 +795,7 @@
fixed_mode->type |= DRM_MODE_TYPE_PREFERRED;
intel_panel_init(&intel_connector->panel, fixed_mode, NULL);
+ intel_panel_setup_backlight(connector);
return;
diff -ur old/drivers/gpu/drm/i915/intel_panel.c linux-3.18.0-0.rc6.git0.1.1awb.x86_64/drivers/gpu/drm/i915/intel_panel.c
--- old/drivers/gpu/drm/i915/intel_panel.c 2014-11-24 16:07:51.590050297 -0800
+++ linux-3.18.0-0.rc6.git0.1.1awb.x86_64/drivers/gpu/drm/i915/intel_panel.c 2014-11-24 16:08:28.200423985 -0800
@@ -31,6 +31,7 @@
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
#include <linux/moduleparam.h>
+#include <linux/mfd/intel_soc_pmic.h>
#include "intel_drv.h"
void
@@ -532,6 +533,11 @@
return _vlv_get_backlight(dev, pipe);
}
+static u32 vlv_pmic_get_backlight(struct intel_connector *connector)
+{
+ return intel_soc_pmic_readb(0x4E);
+}
+
static u32 intel_panel_get_backlight(struct intel_connector *connector)
{
struct drm_device *dev = connector->base.dev;
@@ -607,6 +613,11 @@
I915_WRITE(VLV_BLC_PWM_CTL(pipe), tmp | level);
}
+static void vlv_pmic_set_backlight(struct intel_connector *connector, u32 level)
+{
+ intel_soc_pmic_writeb(0x4E, level);
+}
+
static void
intel_panel_actually_set_backlight(struct intel_connector *connector, u32 level)
{
@@ -726,6 +737,14 @@
I915_WRITE(VLV_BLC_PWM_CTL2(pipe), tmp & ~BLM_PWM_ENABLE);
}
+static void vlv_pmic_disable_backlight(struct intel_connector *connector)
+{
+ intel_panel_actually_set_backlight(connector, 0);
+
+ intel_soc_pmic_writeb(0x51, 0x00);
+ intel_soc_pmic_writeb(0x4B, 0x7F);
+}
+
void intel_panel_disable_backlight(struct intel_connector *connector)
{
struct drm_device *dev = connector->base.dev;
@@ -930,6 +949,17 @@
I915_WRITE(VLV_BLC_PWM_CTL2(pipe), ctl2 | BLM_PWM_ENABLE);
}
+static void vlv_pmic_enable_backlight(struct intel_connector *connector)
+{
+ struct intel_panel *panel = &connector->panel;
+
+ intel_soc_pmic_writeb(0x4B, 0xFF);
+ intel_soc_pmic_writeb(0x4E, 0xFF);
+ intel_soc_pmic_writeb(0x51, 0x01);
+
+ intel_panel_actually_set_backlight(connector, panel->backlight.level);
+}
+
void intel_panel_enable_backlight(struct intel_connector *connector)
{
struct drm_device *dev = connector->base.dev;
@@ -1273,6 +1303,20 @@
return 0;
}
+static int vlv_pmic_setup_backlight(struct intel_connector *connector)
+{
+ struct intel_panel *panel = &connector->panel;
+
+ printk("vlv_pmic_setup_backlight\n");
+ panel->backlight.present = 1;
+ panel->backlight.min = 0x00;
+ panel->backlight.max = 0xFF;
+ panel->backlight.level = 20;
+ panel->backlight.enabled = 1;
+
+ return 0;
+}
+
int intel_panel_setup_backlight(struct drm_connector *connector)
{
struct drm_device *dev = connector->dev;
@@ -1342,11 +1386,19 @@
dev_priv->display.set_backlight = pch_set_backlight;
dev_priv->display.get_backlight = pch_get_backlight;
} else if (IS_VALLEYVIEW(dev)) {
- dev_priv->display.setup_backlight = vlv_setup_backlight;
- dev_priv->display.enable_backlight = vlv_enable_backlight;
- dev_priv->display.disable_backlight = vlv_disable_backlight;
- dev_priv->display.set_backlight = vlv_set_backlight;
- dev_priv->display.get_backlight = vlv_get_backlight;
+ if (i915.force_backlight_pmic) {
+ dev_priv->display.setup_backlight = vlv_pmic_setup_backlight;
+ dev_priv->display.enable_backlight = vlv_pmic_enable_backlight;
+ dev_priv->display.disable_backlight = vlv_pmic_disable_backlight;
+ dev_priv->display.set_backlight = vlv_pmic_set_backlight;
+ dev_priv->display.get_backlight = vlv_pmic_get_backlight;
+ } else {
+ dev_priv->display.setup_backlight = vlv_setup_backlight;
+ dev_priv->display.enable_backlight = vlv_enable_backlight;
+ dev_priv->display.disable_backlight = vlv_disable_backlight;
+ dev_priv->display.set_backlight = vlv_set_backlight;
+ dev_priv->display.get_backlight = vlv_get_backlight;
+ }
} else if (IS_GEN4(dev)) {
dev_priv->display.setup_backlight = i965_setup_backlight;
dev_priv->display.enable_backlight = i965_enable_backlight;
diff -ur old/drivers/mfd/intel_soc_pmic_core.c linux-3.18.0-0.rc6.git0.1.1awb.x86_64/drivers/mfd/intel_soc_pmic_core.c
--- old/drivers/mfd/intel_soc_pmic_core.c 2014-11-24 16:07:51.844052890 -0800
+++ linux-3.18.0-0.rc6.git0.1.1awb.x86_64/drivers/mfd/intel_soc_pmic_core.c 2014-11-24 16:08:14.207281155 -0800
@@ -26,6 +26,8 @@
#include <linux/mfd/intel_soc_pmic.h>
#include "intel_soc_pmic_core.h"
+static struct intel_soc_pmic *pmic_hack = NULL;
+
/*
* On some boards the PMIC interrupt may come from a GPIO line.
* Try to lookup the ACPI table and see if such connection exists. If not,
@@ -64,6 +66,7 @@
config = (struct intel_soc_pmic_config *)id->driver_data;
pmic = devm_kzalloc(dev, sizeof(*pmic), GFP_KERNEL);
+ pmic_hack = pmic;
dev_set_drvdata(dev, pmic);
pmic->regmap = devm_regmap_init_i2c(i2c, config->regmap_config);
@@ -135,6 +138,38 @@
}
#endif
+int intel_soc_pmic_readb(int reg)
+{
+ int ret;
+ unsigned int val;
+
+ if (!pmic_hack) {
+ ret = -EIO;
+ } else {
+ ret = regmap_read(pmic_hack->regmap, reg, &val);
+ if (!ret) {
+ ret = val;
+ }
+ }
+
+ return ret;
+}
+EXPORT_SYMBOL(intel_soc_pmic_readb);
+
+int intel_soc_pmic_writeb(int reg, u8 val)
+{
+ int ret;
+
+ if (!pmic_hack) {
+ ret = -EIO;
+ } else {
+ ret = regmap_write(pmic_hack->regmap, reg, val);
+ }
+ return ret;
+}
+EXPORT_SYMBOL(intel_soc_pmic_writeb);
+
+
static SIMPLE_DEV_PM_OPS(intel_soc_pmic_pm_ops, intel_soc_pmic_suspend,
intel_soc_pmic_resume);
diff -ur old/include/linux/mfd/intel_soc_pmic.h linux-3.18.0-0.rc6.git0.1.1awb.x86_64/include/linux/mfd/intel_soc_pmic.h
--- old/include/linux/mfd/intel_soc_pmic.h 2014-11-24 16:07:46.912002548 -0800
+++ linux-3.18.0-0.rc6.git0.1.1awb.x86_64/include/linux/mfd/intel_soc_pmic.h 2014-11-24 16:08:14.207281155 -0800
@@ -27,4 +27,8 @@
struct regmap_irq_chip_data *irq_chip_data;
};
+int intel_soc_pmic_readb(int reg);
+int intel_soc_pmic_writeb(int reg, u8 val);
+
+
#endif /* __INTEL_SOC_PMIC_H__ */

8
kernel.spec
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@ -642,6 +642,13 @@ Patch31013: rt5640_enable_mic.patch
# Fix wifi on V8P(?) from Jan-Michael Brummer
Patch31014: sdhci-pm.patch
# https://bugs.freedesktop.org/show_bug.cgi?id=85977
# Hacky implementation of backlight support for (at least) Dell Venue 8 Pro
# This is the patch attached to the bug plus a further change sent by email
# by J-M which makes the hack optional, enabled only if
# i915.force_backlight_pmic=1 is passed on the cmdline
Patch31015: baytrail-backlight.patch
# END OF AWB PATCH DEFINITIONS
# END OF PATCH DEFINITIONS
@ -1380,6 +1387,7 @@ ApplyPatch support-Dell-OEM-chipset-found-in-Venue-8-Pro-SDIO-I.patch
#ApplyPatch rt5640_enable_mic.patch
ApplyPatch soc_button_use_leftmeta.patch
ApplyPatch sdhci-pm.patch
ApplyPatch baytrail-backlight.patch
# END OF AWB (BAYTRAIL) PATCH APPLICATIONS